Key FeaturesInsulation: It is a double-walled, vacuum-insulated bottle designed to keep drinks hot or cold for 6–12 hours.Material: The interior is typically made of 316 stainless steel, with a 304 stainless steel exterior for durability and rust resistance.Convenience: It features a large handle for easy carrying and a secure straw lid that is often leakproof.Design Variations: This tumbler is part of a series of "Kawaii" animal-themed bottles, including other pastel colors and different animal characters like those seen in the rest of your image.